xichen01 commented on PR #4251:
URL: https://github.com/apache/ozone/pull/4251#issuecomment-1420259715

   > No this is okay. I'll review. Thanks. One suggestion though: some of the 
operations under test are not pure metadata operations, such as READ_FILE and 
READ_KEY. Some of the operations may duplicate existing freon tools.
   > 
   > In any case, I think this is nice too to have. Being able to generate 
random-like workloads is great.
   > 
   > cc: @DaveTeng0
   
   by default,  `READ_FILE` and `READ_KEY`, `WRITE_FILE` and `WRITE_KEY` data 
size is 0, so will not read/write data from DN, and will only access directly 
with the OM(the OM will access SCM but will not allocate block). This can be 
understood as the maximum read/write QPS that OM can achieve when there are 
infinite DNs.


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